检索结果-南通市图书馆

Evolution of light deflection and shadow from a gauge-potential.like AdS black hole under the influence of a non-magnetic plasma medium

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical.Physics 2024年第9期76卷 83-94页

作者： riasat al. Xia Tiecheng Muhammad Awais Rimsha Babar Department of Mathematics Shanghai University and Newtouch Center for Mathematics of Shanghai UniversityShanghai-200444China Department of Mathematics University of Engineering and Technology Lahore-54890Pakistan Department of Mathematics GC University Faisalabad Layyah CampusLayyah-31200Pakistan

We investigate the light deflection in the weak field approximation from the accelerating charged AdS black *** this purpose,we apply the Gauss–Bonnet theorem to cal.ulate the light deflection in the weak field area and use the Gibbons–Werner approach to anal.ze the optical.geometry of the accelerating charged AdS black hole in the non-magnetic plasma absence/presence of a non-magnetic *** al.o represent the graphical.behavior of the light deflection angle *** impact *** al.o compute the light deflection angle using Keeton and Petters approximations under the impact of accelerating charged AdS black hole ***,by using the ray-tracing approach,we determine the shadow in the nonmagnetic plasma presence and al.o demonstrate that graphical.shadow has an impact on the gauge potential.non-magnetic plasma frequencies and charge.

关键词： accelerating charged Ad S black hole Gibbons-Werner approach deflection angle ray-tracing approach shadow

Thermal.anal.sis of the Rindler-Schwarzschild black hole via corrected entropy

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical.Physics 2024年第9期76卷 95-106页

作者： al.ah Ditta Xia Tiecheng riasat al. al.Övgün Department of Mathematics Shanghai University and Newtouch Center for Mathematics of Shanghai UniversityShanghai200444China Physics Department Eastern Mediterranean UniversityFamagusta99628 North Cyprus via Mersin 10Turkiye

In this study,we investigate the thermodynamic characteristics of the Rindler–Schwarzschild black hole *** anal.sis encompasses the examination of energy emission,Gibbs free energy,and thermal.*** cal.ulate various quantities such as the Hawking temperature,geometric mass,and heat capacity to assess the local.and global.thermodynamic *** temperature of the black hole is determined using the first law of thermodynamics,while the energy emission rate is eval.ated as *** computing the Gibbs free energy,we explore the phase transition behavior exhibited by Rindler–Schwarzschild black hole,specifical.y examining the swal.owing ***,we derive the corrected entropy to investigate the influence of thermal.fluctuations on smal. and large black ***,we compare the impact of correction terms on the thermodynamic system by comparing the results obtained for large black holes and smal. black holes.

关键词： black holes thermodynamics thermal.fluctuations heat capacity Gibbs free energy energy emission Rindler–Schwarzschild black hole

Anal.zing Thermal.Stratification and Nanoparticle Shapes Influence on an EMHD Ternary Nanofluid Flow amidst Two Spinning Disks

在线全文

学校读者我要写书评

暂无评论

Journal.of Applied Mathematics and Physics 2024年第8期12卷 3017-3025页

作者： Muhammad Ramzan Saima riasat Department of Computer Science Bahria University Islamabad Pakistan Department of Mathematical.Science Fatima Jinnah Women University Rawalpindi Pakistan

The present study examines the thermal.distribution of ternary nanofluid flow amid two spinning disks influenced by electric and magnetic fields. Keeping in view the shape of the particles, the electrical.y conducting ternary nanofluid is anal.zed with variable thermophysical.features. Three types of nanoparticles namely Copper, al.minum Oxide, and Graphene with spherical. cylindrical. and platelet shapes are taken respectively and are immersed in a (50-50)% ratio of water and ethylene glycol mixture which acts as a base fluid. The anticipated problem is addressed by employing a reliable and user-friendly numerical.bvp4c built-in collocation scheme. This solution is then showcased through illustrations and tables. Strengthening the radiation results in an enhanced heat transfer rate. Radial.and azimuthal.velocities once rotation of disks is enhanced. The key findings provide a strong theoretical.background in photovoltaic cells, solar collectors, radiators, solar water heaters, and many other applications.

关键词： Trihybrid Nanofluid Flow Thermal.Stratification Particle Shapes Spin-ning Disks

Tunneling of massive vector particles under influence of quantum gravity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics C 2020年第1期44卷 149-158页

作者： Wajiha Javed riasat al. Rimsha Babar al.Övgün Division of Science and Technology University of EducationTownship-LahorePakistan Department of Mathematics Government CollegeUniversity Faisalabad Layyah CampusLayyah-31200Pakistan Instituto de Física Pontificia Universidad Católica de ValparaísoCasilla 4950ValparaísoChile Physics Department Faculty of Arts and SciencesEastern Mediterranean UniversityFamagustaNorth Cyprusvia Mersin 10Turkey

This study set out to investigate charged vector particles tunneling via horizons of a pair of accelerating rotating charged NUT black holes under the influence of quantum *** this end,we use the modified Proca equation incorporating general.zed uncertainty *** the WKB approximation to the field equation,we obtain a modified tunneling rate and the corresponding corrected Hawking temperature for this black ***,we anal.ze the graphical.behavior of the corrected Hawking temperature T'_H with respect to the event horizon for the given black *** considering quantum gravitational.effects on Hawking temperatures,we discuss the stability anal.sis of this black *** a pair of black holes,the temperature T'_H increases with the increase in rotation parameters a andω,correction parameterβ,black hole acceleration a,and arbitrary parameter k,and decreases with the increase in electric e and magnetic charges g.

关键词： massive boson particles wave equation quantum gravity Hawking radiation black hole thermodynamics

Face Mask and Social.Distance Monitoring via Computer Vision and Deployable System Architecture

在线全文

学校读者我要写书评

暂无评论

Intelligent Automation & Soft Computing 2023年第3期35卷 3641-3658页

作者： Meherab Mamun Ratul Kazi Ayesha Rahman Javeria Fazal.Naimur Rahman Abanto riasat Khan Department of Electrical.and Computer Engineering North South UniversityDhakaBangladesh

The coronavirus(COVID-19)is a lethal.virus causing a rapidly infec-tious disease throughout the *** awareness,taking preventive mea-sures,imposing strict restrictions on public gatherings,wearing facial.masks,and maintaining safe social.distancing have become crucial.factors in keeping the virus at *** though the world has spent a whole year preventing and curing the disease caused by the COVID-19 virus,the statistics show that the virus can cause an outbreak at any time on a large scal. if thorough preventive measures are not maintained ***ﬁght the spread of this virus,technological.y developed systems have become very ***,the implementation of an automatic,robust,continuous,and lightweight monitoring system that can be efﬁciently deployed on an embedded device still has not become preval.nt in the mass *** paper aims to develop an automatic system to simul-taneously detect social.distance and face mask violation in real.time that has been deployed in an embedded system.A modiﬁed version of a convolutional.neural.network,the ResNet50 model,has been utilized to identify masked faces in *** Only Look Once(YOLOv3)approach is applied for object detection and the DeepSORT technique is used to measure the social.*** efﬁciency of the proposed model is tested on real.time video sequences taken from a video streaming source from an embedded system,Jetson Nano edge computing device,and smartphones,Android and iOS *** results show that the implemented model can efﬁciently detect facial.masks and social.distance viola-tions with acceptable accuracy and precision scores.

关键词： Artiﬁcial.intelligence COVID-19 deep learning technique face mask detection social.distance monitor you only look once

Modelling Irrigation and Sal.nity Management Strategies in the Ord Irrigation Area

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Natural.Resources 2010年第1期1卷 34-56页

作者： riasat al. John Byrne Tara Slaven CSIRO Land and Water Department of Agriculture and Food Western Australi

The Ord River Irrigation Area (ORIA) is located within northern Western Austral.a near the Northern Territory border. Since the beginning of irrigated agriculture in the ORIA the groundwater levels have been continuously rising and are now close to the soil surface in some parts of ORIA in northern Western Austral.a. The groundwater is now sal.ne throughout most of the ORIA and soil sal.nity risks are high where the watertables are shal.ow. This research eval.ated irrigation and sal.nity management strategies for sugarcane and maize crops grown over deep and shal.ow, non-sal.ne and sal.ne watertables in the ORIA. The LEACHC model, cal.brated using field data, was used to predict the impacts of various irrigation management strategies on water use and sal. accumulation in the root zone. This study concluded that irrigation application equal.to 100% of total.fortnightly pan evaporation applied at 14 day interval. was a good irrigation strategy for the maize grown over a deep watertable area. This strategy would require around 11 ML/ha of irrigation water per growing season. Irrigation application equal.to 75% of total.fortnightly pan evaporation, applied every fortnight during first hal. of the growing season, and 75% of total.weekly pan evaporation, applied on a weekly basis during second hal. of the growing season, would be the best irrigation strategy if it is feasible to change the irrigation interval.from 14 to seven days. This irrigation strategy is predicted to have minimal.sal.nity risks and save around 40% irrigation water. The best irrigation strategy for sugarcane grown on Cununurra clay over a deep watertable area would be irrigation application equal.to 50% of the total.fortnightly pan evaporation, applied every fortnight during first quarter of the growing season, and irrigation application amounts equal.to 100% of total.weekly pan evaporation, applied every week during rest of the season. The model predicted no soil sal.nity risks from this irrigation s

关键词： Irrigation Modelling Sal.nity Modelling Sal.ne Shal.ow Watertable Irrigation Management Ord River Irrigation Area

Risk Anal.sis Technique on Inconsistent Interview Big Data Based on Rough Set Approach

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal.of Data Anal.sis and Information Processing 2016年第3期4卷 101-114页

作者： riasat Azim Abm Munibur Rahman Shawon Barua Israt Jahan School of Computer Science & Engineering Wuhan University of Technology Wuhan China School of Management Wuhan University of Technology Wuhan China Infolytx Inc. Dhaka Bangladesh East West University Dhaka Bangladesh

Rough set theory is relativly new to area of soft computing to handle the uncertain big data efficiently. It al.o provides a powerful way to cal.ulate the importance degree of vague and uncertain big data to help in decision making. Risk assessment is very important for safe and reliable investment. Risk management involves assessing the risk sources and designing strategies and procedures to mitigate those risks to an acceptable level. In this paper, we emphasize on classification of different types of risk factors and find a simple and effective way to cal.ulate the risk exposure.. The study uses rough set method to classify and judge the safety attributes related to investment policy. The method which based on intelligent knowledge accusation provides an innovative way for risk anal.sis. From this approach, we are able to cal.ulate the significance of each factor and relative risk exposure based on the original.data without assigning the weight subjectively.

关键词： Rough Set Theory Big Data Risk Anal.sis Data Mining Variable Weight Significance of Attribute Core Attribute Attribute Reduction

Power efficient scheme for self local.zation in wireless sensor networks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

通讯和计算机（中英文版） 2009年第10期6卷 37-43,53页

作者： al.on Rai Sangita al. Syed S. Rizvi Aasia riasat Computer Science and Engineering Department University of Bridgeport Bridgeport 06604 USA Computer Science Department Institute of Business Management Karachi 78100 Pakistan

With the tremendous applications of the wireless sensor network, self-local.zation has become one of the chal.enging subject matter that has gained attention of many researchers in the field of wireless sensor network. Local.zation is the process of assigning or computing the location of the sensor nodes in a sensor network. As the sensor nodes are deployed randomly, we do not have any knowledge about their location in advance. As a result, this becomes very important that they local.ze themselves as manual.deployment of sensor node is not feasible. al.o, in WSN the main problem is the power as the sensor nodes have very limited power source. This paper provides a novel solution for local.zing the sensor nodes using controlled power of the beacon nodes such that we will have longer life of the beacon nodes which plays a vital.role in the process of local.zation as it is the only special.nodes that has the information about its location when they are deployed such that the remaining ordinary nodes can local.ze themselves in accordance with these beacon node. We develop a novel model that first finds the distance of the sensor nodes then it finds the location of the unknown sensor nodes in power efficient manner. Our simulation results show the effectiveness of the proposed methodology in terms of controlled and reduced power.

关键词：无线传感器网络网络定位传感器节点节点位置省电本地化仿真结果控制权

Peste des Petits Ruminants Vaccine (Nigerian Strain 75/1) Confers Protection for at Least 3 Years in Sheep and Goats

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal.of Biosciences and Medicines 2014年第6期2卷 27-33页

作者： Aamer Bin Zahur Hamid Irshad Aman Ullah Muhammad Afzal.Asma Latif riasat Wasee Ullah Umer Farooq Muhammad Humayoon Samo Muhammad Jahangir Animal.Heal.h Research Laboratories Animal Sciences Institute National Agricultural Research Centre Islamabad Pakistan FAO-UN Pakistan (GCP/PAK/127/USA) NARC Park Road Islamabad Pakistan

The present study reports the duration of immunity and protective efficacy of Peste des Petits Ruminants (PPR) vaccine (Nigerian strain 75/1) in sheep and goats. A total.of 105 sheep and goats were divided into three groups A, B and C. Group A received normal.recommended dose (1.0 ml) of PPR vaccine, group B received hal. dose (0.5 ml) of PPR vaccine and group C was kept as unvaccinated control group in contact with vaccinated animal.. The post vaccination dynamics of antibodies against PPR virus was studied. It was found that significant antibody titres persisted for 3 years post vaccination in sheep and goats vaccinated with either full dose or hal. dose of PPR vaccine. The chal.enge protection studies were carried out in experimental.animal. at 24 and 36 month post vaccination. The vaccinates withstood chal.enge and were found completely resistant clinical.y and virological.y to virulent PPR virus for 24 and 36 months post vaccination. The unvaccinated control animal. developed typical.clinical.signs of PPR and the chal.enged virus was detected in ocular, nasal.and oral.secretions of these animal.. This study demonstrated that a single immunization with PPR vaccine conferred solid protection in sheep and goats for 3 years.

关键词： PPR Vaccine Smal. Ruminants